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/*
* Copyright (c) 2021 Ben Fuller
*/
#include <errno.h>
#include <string.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include "cgol.h"
#ifndef __TEST
#define NROWS 20
#define NCOLS 20
#else
#define NROWS 10
#define NCOLS 10
#endif
/* check errno and the result of ato* for an error */
void
check(int res) {
if (res == 0 && errno != 0) {
fprintf(stderr, "bad argument\n");
fprintf(stderr, "usage: cgol [width height [gens]]\nthe defaults are \"800\" \"600\" \"200\"\n");
exit(1);
}
errno = 0;
}
int
main(int argc, char **argv) {
int c;
double width, height;
int gens;
int check_births = 0;
while ((c = getopt(argc, argv, "hw:l:g:")) != -1) {
switch (c) {
case 'h':
fprintf(stderr, "usage: %s [ -w width -l height -g gens]\nthe defaults are \"-w 800 -l 600 -g 200\"\n", *argv);
return 1;
case 'w':
errno = 0;
width = atof(optarg);
check(width);
break;
case 'l':
errno = 0;
height = atof(optarg);
check(height);
break;
}
}
argc -= optind;
argv += optind - 1;
if (argc > 2) {
errno = 0;
width = atof(*++argv);
check(width);
height = atof(*++argv);
check(height);
if (argc > 3) {
gens = atoi(*++argv);
check(gens);
if (gens == 0) {
gens = 999999;
check_births = 1;
}
if (gens < 1 || gens > 999999) {
/* the upper limit is to ensure the gen number fits onto the
* image filenames */
fprintf(stderr, "bad gens arg\n");
return 1;
}
} else
gens = 200;
} else {
width = 800;
height = 600;
gens = 200;
}
struct imgdata img = {
width, height,
NROWS, NCOLS,
{ 1, 1, 1, },
{ 0.1, 0.1, 0.1 },
{ 0, 0, 0 }
};
#ifndef __TEST
short cells[NROWS][NCOLS] = { 0 };
randomize(&cells[0][0], NCOLS, NROWS);
#else
short cells[NROWS][NCOLS] = {
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 1, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 1, 0, 0, 0, 0, 0 },
{ 0, 1, 1, 0, 0, 1, 1, 1, 0, 0 },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
};
#endif
int gen, n_alive;
char *fn = malloc(12 + 6);
int n_alive1, n_alive2, n_alive3;
n_alive3 = n_alive2 = n_alive1 = 0;
for (gen = 0; gen < gens; gen++) {
#ifdef __TEST
printf("==> GEN %d <==\r", gen);
#endif
/* %06d because gens <= 999999 */
sprintf(fn, "images/%06d.png", gen);
if (png(&img, &cells[0][0], fn) != 0) {
free(fn);
return 1;
}
n_alive = evolve(&cells[0][0], NCOLS, NROWS);
if (check_births) {
if (n_alive == n_alive1 && n_alive == n_alive2 && n_alive == n_alive3)
break;
n_alive3 = n_alive2;
n_alive2 = n_alive1;
n_alive1 = n_alive;
}
#ifndef __TEST
printf("%d\n", n_alive);
#endif
}
free(fn);
#ifdef __TEST
puts("");
#endif
return 0;
}
void
randomize(short *cells, int nx, int ny) {
srand(time(NULL));
int i, j;
for (i = 0; i < ny; i++)
for (j = 0; j < nx; j++)
*(cells + i * nx + j) = rand() % 2 ? 1 : 0;
}
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